Ferguson , Missouri -LRB- CNN -RRB- -- Two months .

It looks like it might be that long before a local grand jury decides whether to bring charges in the death of Michael Brown -- the loud , passionate calls for swift justice notwithstanding .

The shooting of the African-American teenager by a white Ferguson , Missouri , police officer has sparked days of demonstrations and nights of often violence protests in the St. Louis suburb .

St. Louis County Prosecuting Attorney Robert McCulloch told CNN affiliate KMOV that his office planned to begin presenting the case to a grand jury Wednesday . The grand jury could levy significant charges against Darren Wilson , the police officer who shot and killed the 18-year-old Brown .

But McCulloch suggested Wednesday that any action -- charges or no charges -- wo n't come any time soon .

`` The aspirational time is by mid-October to have everything completed , '' the prosecutor told the station .

Granted , McCulloch is n't the only law enforcement leader whose office could take action against Wilson . One other such leader -- U.S. Attorney General Eric Holder -- spent Wednesday in and around Ferguson , Missouri , talking with residents , leaders and the man charged with maintaining security in the city after nearly two weeks of unrest .

The most high-profile figure in President Barack Obama 's administration to visit Ferguson , Holder has stressed that the federal government is on the case and listening -- both to protesters calling for Wilson 's arrest and for an end to what they describe as a heavy-handed police response , and to residents and law enforcement officers challenged with looting and violence from some in the crowd .

Holder joined dozens of FBI agents who have swarmed on the eastern Missouri city , as the U.S. Justice Department 's civil rights division probes the case .

But for charges and a conviction in a federal civil rights case , authorities would have to prove `` racial hostility , '' according to CNN senior legal analyst Jeffrey Toobin , should they argue that Wilson somehow targeted Brown . Holder himself acknowledged this distinction Wednesday , saying that he hoped all of the investigative work being done has a positive impact .

That said -- for all the symbolic significance of a sitting attorney general visiting the site of an active investigation -- what happens in the St. Louis County courts may more likely impact activists ' bottom line : justice for Brown 's family in the form of Wilson 's arrest .

On the local level , Missouri 's governor could appoint a special prosecutor to the case in place of McCulloch .

Antonio French , a St. Louis alderman who has been a protest fixture , thinks installing a special prosecutor would be smart given the African-American community 's distrust of the county prosecutor and law enforcement in general . Perception equates to reality if it means that citizens do n't trust McCulloch , French said .

`` We 're trying to restore faith in the justice system , '' said French , who claimed McCulloch 's `` relationship with the African-American community has not been good for a long time . ''

For his part , McCulloch told KMOV that he wants the case to proceed through the grand jury `` expeditiously '' but also `` thoroughly . ''

`` We 're not going to rush it through , and we 're not going to leave anything out , '' he said . `` They will have absolutely everything that there is , every piece of paper , every photograph , every bit of physical evidence , all the forensic information . ''

Assuming McCulloch stays in charge and his grand jury timeline holds , French said that having weeks and weeks go by will only aggravate the situation .

`` I think the people expect to see something by now , '' he said . `` And they 're getting frustrated . ''

5 things to know about Michael Brown 's shooting

Wilson backers challenged , then whisked away

While not as large in number as previous days , protesters were out again Wednesday night .

One thing different this time around : a man and a woman who held up a sign that read , `` Justice for Police Officer Wilson . ''

Dawn , a restaurant employee who asked not to be identified by her full name because she believed that Wilson 's supporters could be endangered , said , `` We just feel like we have a First Amendment right like everyone else . If they 're calling for justice , we need justice for everyone . ''

The man alongside her , Chuck , added : `` All our friends think we 're crazy , but someone has to take a stand . ''

The pair quickly drew dozens of Brown family supporters , who converged and yelled at them . Yet the commotion ended quickly when the two Wilson supporters were whisked away .

On Tuesday night , hours of relative calm were upended when someone threw a bottle at police .

Officers -- lined up in front of businesses , wearing helms and shields -- responded by sprinting after young men . This prompted a handful of protesters to toss more bottles , glass and plastic . Missouri State Highway Patrol Capt. Ron Johnson , who is in charge of security , later told reporters someone threw urine on police .

Complete coverage of Ferguson shooting and protests

After the chase , the number of riot police ballooned . Officers brought out dogs . One officer used pepper spray on some in the crowd .

Protesters locked hands in front of a police line , and some urged the crowd to remain peaceful . Others , wearing T-shirts printed with the word `` peacekeeper , '' tried to defuse tensions .

Johnson credited them for preventing further escalation .

Police arrested 47 people , Johnson said , including a car full of people who he said were armed and threatened to shoot an officer .

At least one officer also threatened a protester : The St. Louis County Police Department said an officer from nearby St. Ann was suspended indefinitely after pointing an assault rifle at a `` peaceful '' protester . Video showed the St. Ann officer cursing and threatening to kill a protester .

Russel Honore , a retired Army general who handled crowd control in the chaos that ensued after Hurricane Katrina in New Orleans in 2005 , was among those critics of the law enforcement response .

Looking at crowd members through the scope of a gun sends the wrong message , he said .

`` You 're there to protect people , '' Honore added . `` They need to sense that from you . ''

Holder : ` We need concrete action to change things '

In his public comments , Holder has urged law enforcement to show restraint and respect people 's right to protest , while he has condemned looting and violence by protesters .

On Wednesday , he made it personal as well .

In addition to meeting with Michael Brown 's parents , Holder talked at nearby Florissant Valley Community College about his own experiences as a black man with racial profiling -- including once when police flagged him down for no apparent reason in Washington , when he was a federal prosecutor .

`` We are starting here a good dialogue , but the reality is the dialogue is not enough , '' he said . `` We need concrete action to changes things in this country . ''

After these remarks , 27-year-old student Molyric Welch -- who said her brother died of cardiac arrest , allegedly after Ferguson police used a stun gun on him in 2011 -- credited Holder with giving her and others needed `` inspiration '' at a time when her city 's future `` is blurry . ''

Magazine : The aftermath in Ferguson

Read more about the flash point in the Heartland at CNN.com / US

Eliott C. McLaughlin reported from Ferguson . Michael Pearson and Greg Botelho reported and wrote from Atlanta . CNN 's Ben Brumfield , Dana Ford , Jim Acosta and Mayra Cuevas also contributed to this report .

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NEW : 2 hold signs backing Officer Darren Wilson , then are confronted by others

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NEW : Attorney General Holder recalls his own experiences with racial profiling

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A county grand jury to hear evidence , could opt to indict the officer who killed Brown

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The case has spurred protests by those calling for charges against the officer